There is a text file it says ( Manifest_NonUFSFiles_Win64 )
And, it don't say any error message.
Not sure what the issue is. I'm unable to replicate it. It could possibly be a corrupted save data file? You could try going to "C:/Users/[YOU]/AppData/Local/" and deleting the "BoofiesBunker" folder. Just keep in mind, if you had any previous save data, this will delete it. I'd back it up in a different location before trying this. Just in case it doesn't work.